Metal-sawing machine.



U. A. JUENGST.

METAL SAWING MACHINE.

APPLICATION FILED Amm ma Patented Dec. 19, 1911.

C. A. JUBNGST.

METAL SAWING MACHINE.

APPLIUATION FILED Auf.'A 9, 1910.

Patented Deo. 19, 1911 4 SHEBTSMSHEET i] 1,91 Patented Dec. 19, 191

4 SHEETS VSHEET' 3 Q fg@ C. A. JUENGST.

METAL SAWING MACHINE.

APPLwATloN FILED AUG. s, 19m.

1,012,204. Patented Dee. 19, 1911 4 SHEETS--SBEET 4 shaft and on the end of the shaft g is a bevel-wheel f and this wheel f gears into a bevel pinion f2 u on the shaft d and by this bevel pinion an bevel wheel the rotation and the power of the shaft g are communicated to the shaft d. The rotation and the power that are needed for the rotation of the saw are communicated as shown and described in my aforesaid patent.; Fig. 1 showing only so much as is necessary with this application, namely, the shaft k3 ,and the sprocket It* which turn the saw; the connections thereto from the power shaft g not be` ing shown.

Referring especially to Fig. 1, the bevelV wheel f is provided with a hub f1 upon the shaft g and this bevel gear wheel f is provided with a shoulder on which is mounted a sprocket e and a washer comes between the juxtaposed faces of this bevel ear wheel f and the sprocket e, and with t ese parts I provide a friction ing c1 and a series of bolts c2 which pass through the bevel wheel f and through the friction ring e1 with helical springs 7 'around the projecting parts of these bolts and between the outer face of the friction ring e1 and the end nuts. These latter may be screwed down to increase the tension of the springs 7 and bring the friction ring with more or less force against the back of the sprocket e so as to increase the grip of said sprocket to the bevel gear wheel A chain e3 passes around the friction eld sprocket e and also around a sprocket e* which is loose on the feed screw shaft i2. This sprocket el is made with a sleeve e and on the opposite end of the sleeve from the sprocket 1s a clutch end e". These parts are free to turn about the screw shaft 2 except as engaged as hereinafter described.

'lhe devices just described have a yielding function, the object of which is to prevent the reverse movement or change of movement or direction from feed to return being too sudden, too positive and too quick acting, for these devices will yield and prevent jar or strain and all the parts will run in unison as soon as sufficient momentum has been attained. l

i represents a bearing sleeve for the screw feed shaft tand which is secured to the frame a1.

-I prefer to form with the standard 10 a segment 11 on the upper end thereof which is provided with a series of holes in the outer face. The shaft d not only passes through the standard 1,0 but through a rocker arm. h and through the hub of a large ear lg? which is keyed thereto; therefore t e rocker arm is free to move in a swinging relation upon the shaft el between the hub of the gear k1 and the face of the standard 10.

The upper end of the rocker arm h is made tubular and serves the purpose of a handle for swinging the same, and throu h this tubular part or sleeve 17 passes a loc ing pin al* which may be threaded in the sleeve 17 or be spring-held. The function performed by the sleeve 17 and its locking pin movable therein is to locate the posit-ion of this rocker arm h and the gear carried thereby; it being apparent from Figs. 1 and 2 that there are several openings in the outer surface of the se ment 11 adapted to receive the inner end o this locking pin J1 so as to suitably ositon the rocker arm h and the parts carried thereby. On an arbor carried by this rocker arm L, I mount a small gear h2 and this meshes with a larve gear k on a shaft lc mounted in a suitabxle bearing k1 formed as a part of the housing a2 of the machine. On arbors also connected to the rockerarm la. I provide the gears 12 13 above the gear h2, and the gears 14.15 below the gear h2. The gears 12 and 13 are connected as one on an arbor and they are ,placed above the gear h2, and the gears 14 15 are connected together and on an arbor below the gear h2. The gear 13, the gear 14: and the gear [L2 are always in mesh with the lar e gear 71.1 and are constantly turning wit this gear so long as the gear h* and the shaft l are rotated. Fig. 2 shows the il? in mesh with the gear h of the sha t 7c, but the rocker arm h can be swung so as to bring the gear 12 in mesh with the gear h5. This will carry the gear h2 out of mesh. The rocker arm k may also be swung in the opposite direct-ion to carry the gear h2 out of mesh with the gear h and brin the gear 15 into mesh with the gear L". onsidering the proportion of the gears 12 to 15 inclusive, it will be noticedthat when the gear 12 is in mebh with the gear v" that the speed imparted to theigear r" will be considerably reduced even over the speed imparted thereto by the' vear itz-and also that when the gear l5 is rought into mesh with the gear h that the speed imparted to the gear h5 will be greatly increased, for the gear 15 is the larger of the transmission gears and thc gear 12 the smaller and these gears are to be so proportioned as to impart speeds of one half inch, one inch, or one and one-half inch through the parts connected therewith and per minute through the screw feed shaft 2 to the saw.

`Referring now particularly 'to Fig. 5, it will be noticed that the gear la is provided with a sleeve h6; that these parts surround the shaft lc. The y are loose on said shaft so as to turn freely if there is no application of power to make them turn with the said shaft.

On the outer end of the shaft k and pinned thereto is a disk c1 with a hub; the hub portion being pinned to the shaft so as to turn therewith. There is also a disk ear newport 3 o2 in :i plane parallel with the disk c1; the disks being separated by a friction disk 16 ot Ysuitalole niateriaL-prol)ably fiber orV leather or some material different from the metal of the disks. The huh of the dish ef surrounds and agrees in its Width with the hub or sleeve 7i of the large gear f1.5. Surrounding the shaft/c and coming next. to the'inner surface of the large gear if' are ball bearinggfs and coming neXt to the bali bea rings and surrounding .the reduced end of the bearing sleeve k1 is a collar Z1. Mounted upon this shaft k is a Worm 7a2 preferably formed integral with the collar pinned to the shaft 7c and between this collar and the adjacent end of the bearing sleeve .lai are hall bearings 23;/ the Worm lez, the collar lg and the ball bearings 23 filling the space between the opposite edjacent ends of the bearing sleeve 1v1 so that these parts remove any possibility of vlost motion or of movement end-wise of the shaft r. vet permit the same to turn in the bearing sleeve irl;

Reterringnow particularly to Figs. l and 3, I-providc s. worm wheel las on the screw teed shet't if in mesh with the Worin ,lf2 on the shaft and by reference to Fig. 3 it will he apparent that on the left hand face ot the worin Wheel In there are clutch teeth 18 formed and that between the clutch teeth e and t8 there is a sliding clutch l which surrounds the'sorew feed shaft This is actuated by a lever Z2 pivoted at 19 to tho housing 0,2; said lever having suitable connection with the sliding clutch Z for the movement thereof.

I provide n spline or key l* (sec Fig. il placed. in the feed shaft i2 and extending through the slide clutch l and I further provide n cage consisting ot Vfour sl ide rods l end two collars Q1; the coller-s surrounding the screw feed sli-ttt i2 and coming within the recesses of the clutch ends t and 18 with the rods 20 held thereto end passing through the sliding clutch Z. This rage member serves the purpose ci separating the sleeve e from the hub ot the Worm wheel-1 and keeping these parts snugly and respectively against the bearing sleeve r'. on the one hand and the housing` on the. other; also preventing anj. posv blc crowding or lecli of free movement longi4r tudinnlly ot tho crew shaft i* of the sliding clutch member.

l/Vhen the lever ZL is moved to the right hand of' Fig. l engaging the clutch Z with the clutch ieeth 18 and Worin-wheel if. the power transmitted from the shaft a? through the trein ol gears (Fig. 2) to the shaft ,lv will; he cminnunicated to the shaft 2 to ieeil the saw to and through the work. .Vhen after the smv has cut through the wort: it is desired to return the sanie'to the place' of beginning and start another cut,

the lever Z2 is moved to the left hand of Fig. l, engaging the clutch Z with the tccth of the clutch e when the power of the chain upon the sleeve will be effective to turn the shaft E in the reverse direction :ind feed hack the saw and the saw carriage to their initial position ready to again be moved for we rd.

Near the right hand end of the screw feed shaft i@ I provide n. collar Qi against a` shoulder ot' the shaft and next to this coller are hull hearings 25. A Collar 2G surrounds the shaft next to the hall bearings 25 and said collar is provided With oppoe sitelyplaced trunnions 27.

The extreme outer end of the screw feed shaft 2 is reduced in diameter and is provided With :i sleeve 2t) which sets up againstthe shoulder of said shaft and is of greater thickness than the reduction of the shaft, and on the extreme end of the shaft there is a nut 30 which secured to the screw threaded end of the shaft holds the sleeve 29 tirmlv in position and forms a sto for the clutch member 31 which surroun s the sleeve 29.

A handle device 32 is provided (see Fig. 2) for moving the clutch meniher '3l into engagement with the clutch sleeve Q8. This clutch sleeve comes between the collar 26 and the left hand end of the sleeve 2.() and is keyed to the .screw feed shaft i?. and these pruts while not comprising any portion of my present invention, are the same end pcrforni the same function as described in nl); aforesaid Letters Patent.

I provide two upright parallel shafts m and n in the housing a2 of the machine and s. rocker member (see particularly Figs. end This rocker member comprises a tubular standard o, a pair of parallel arms o extending oft1 in one direction und anotlier puir of parallel arms u2 extending otl' in slinost tho opposite direction. There is a. web ci between the arms o2 with a hole 323 in this web. The ends of the arms 01 are notched. T he arms straddle the clutch 28 and hear upon the trunnions 27 (see Fig. Pn. The free ends of the arms o2 straddle he bearing sleeve of the shaft x' and hear upon the opposite rear tores of the collar Z with considernlsle force. f

l provide a sector 4r formed' with a toothed periphery or edge and this sector has a huh r mounted upon the shaft n; the sector in turnA being secured h v a bolt or pin 3-1- to an arm of the housing c2 so thnt the sector is held firmly and immovahlef l There is a collar 35 upon the shaft n comin g lnelovv the upper member of the housing fr? end at the other side of the housing from `the h uh r I provide a. lever arm s having a.

huh 3'* mounted upon the shaft n directly above the hub r1 and this hub 31 is pinned securely to the shaft n. This lever arm a carries a spring actuated pavvl s2 secured to its under side and the two teeth with which this pawl is preferably formed come into engagement with the teeth upon the edge of the sector 'r' so as to hold the lever in the desired position, and govern the applied tension.

I provide an arm and hub t securely pinned near the lower endpof the shaft 'n and the f ree end of this arm is connected by a pivot pin 36 to the head o1 of a screw threaded rod u; the free end of this rod fv passing into the hole 33 in the web o3, and around the rod n between a nut and Washer 37 thereon and the face of the web 03 I provide a helical spring o2. It is preferable to form the Web 03 at the hole 33 as a boss so that there is an appreciable length of bearing for the free end of the rod o and by means of the nut 37 initial tension is applied to the springe.

Referring particularly to Figs. 6 and 7, it will be noticed that a movement of the lever s to the right hand of Fig. 6 will swing the shaft n, the arm t, and move the rod 'v and the spring against the web o between the arms o", forcing the frce ends of these armsV 02 against the collar l1; the tendency thus produced being to move the collar l1, the ball bearings 22, the gear h, with its sleeve and the disk c2 with force against the friction disk 16 so as to compel the disk c1 and the shaft lc to turn with and by virtue of the turning movement ofthe gear h5 produced by the small gear It or in turn by the gears 12, 13, or 14, 15, from the main gear h1 on the shaft d.

In the operation of the machine and as hereinbefoi indicated, the screw feed shaft i? may be moved longitudinally and toward the right of Fig. 3, and it will be apparentthat s uch a movement is possible because within the bearing sleeve i the screw feed shaft 2 is shouldered and there is a space indicated at the left hand lof Fig. 3 within this sleeve and between theI shoulder of the shaft and the sprocket c4 intlicating the possibility of this movement.

In the operation of theimachine, should the saw strike a hard prt of the metal through which it is diicu t. to make progress, there would be a back yard or back-lash motion of the feed shaft. his would cause the sha'ft i2 to move toward the right hand of Fig. 3, and while `the motion would be quite slight, still it would be sufficient to move with the shaft the collar 24, the ball bearings 25 and the collar 26 with its trunnions 27, and this longitudinal motion would be also imparted by the trunnions 27 to the arms 01, moving the same and moving the rocker device of which the arms 0l are a part on its shaft m in one direction and correspondingly moving the arms o which are part of the rocker device in thc opposite direction; in other Words,-referring to Fig. 5,-away from the collar ll easing the pressure of contact of the free ends of the arms 02 against this collar and increasing the tension upon the spring fvg. This action will at once cause a momentary disengagement of the friction clutch device formed by the disks cI c2 and the intervening friction disk 16, permitting the gear h5 to turn freely on the shaft 7c and the feed of the screw feed shaft 272 to momentarily cease. This will give the saw an opportunity Without any progressive movement to cut through the diiiicultr or harder part of the metal. It is quite apparent that While this motion may be only slight, it may be repeated at short intervals and could be continuously repeatd at short intervals so long as there was a diicult or hard part of the metal which Would cause a backward movement of the screw feed shaft. Therefore as soon as the saw comes int-o the normal quality of the metal all these parts will resume their normal conditions b the expansion of the spring v2 to its initial position' and the saw be fed normally through the work. lVere it otherwise than this, the saw might be injured if not broken by an effort to force it thronofh the harder metal.

Rcfrring now particularly to Figs. 8 and 9, which show another form of my inven-i tion,-the parts of which have equivalent actions and perform an equivalent function,-I provlde a series of integral gears 38, 39, and 40 of different sizes all preferably formed as parts of a common hub 41 upon the shaft It' and which are loose on the shaft` k, and I also rovide a serios of gears 42, 43, and 44 integ al on a common hub and slidable on the shaft ri and held to the shaftagainst free rotation by a spline shown in Fig. 8. In this connection I employ a link 45 at onel end connected by a pivot joint 4G to the surface of the hub carrying the gears 42, 43, and 44, and at the other end of the link 45 connected by a pivot 47 to a crank arm 48. This crank arm 48 and a lever 49 are connected to the same pivot or shaft while the free end of the lever 49 is adjustably connected to a segment 50. In this form of my invention the gears 3S and 42 may be in mesh as shown in Fig. S, or the series of gears 42, 43 and 44 may be bodily moved by the lever device 49, crank arm 48 and the link 45 so as to bring the gear 43 into mesh with the gear 39, or outwardly to bring the gear 44 into mesh with the gear 40 so as to effect variations in the speed imparted to the screw feed shaft z"-' in an equivalent manner to the variations of speed produced by the devices shown in Figs. 2 and 5 and hereinbefore described. i

In the form of my invention shown in Fig. 10, I have secured to the shaft L' an integral series of pulleys 51, 52 and 53 of vary- Ing sizes and on the shaft d a series of pulleys 5t, 55 and 5G which are keyed fast to the shaft el; the pulleys being connected together by a belt 5i which as shifted connects the pulleys 52 and 55, or 53 and 56, or 51 and 54. These pulleys will also effect an equal variation in the ratio of feed.

I claim as my invention:

1. In a metal sawing machine, the combination with the saw carriage, of a power shaft, a second shaft, gears connecting said shafts, a feed screw for said saw carriage, driving connections between one of said shafts and the feed screw for rotating the screw in one direction to advance the saw through the work, and connections between the other of said shafts and said feed screw for rotating the screw in the opposite direction to Withdraw the saw from the work, said last-named connections ineludin slip devices frictionally engaging one o? said gears.

2. In a metal sawing machine, the combination with the saw carriage, of a power shaft7 a second shaft, gears connecting said shafts, a feed screw for said saw carriage, driving connections between one of said shafts and the feed screw for rotating the screwV in one direction to advance the saw through the work, and connections between the other of sai'd shafts and said feed screw for rotating the screw in the opposite direction to withdraw the saw from the work, said lastnamed connections including a sprocket loosely mounted upon the power shaft, a chain passing around said sprocket, a sprocket mounted upon the feed-screw and around which said chain also passes, a' washer interposed between the sprocket and gear on the power shaft and a friction ring also connected to said sprocket and springheld with sufficient force to cause transmission by the sprorket to the gear under all ordinary circumstances.

l. ln a nietal sawing machine, the combination with the .saw carriage, of a power shaft, a set-ono' shaft, gl-fars connecting said shafts.y a 'fetal screw for said saw carriage, driving connections between one of said l afts` and the fred .screw for rotating the sri-cw in our direi-tion to advance the sar: through the work, and rouurrtions between the other ol' .said shafts and `said fred srl-cw 'fol' rotating)Y tluscrew in the opposite diret:- tion to withdraw the saw front the work, said las! Anamed connections inrhuling a spl-orina leosrly mounted upon the power shaft, a t'liaiu passing around said sprotket, a .sprocket mounted upon the ifi eel-srrew and around which said chain also passes, a washer interposed between the sprocket and gear on the power shaft and coming at the haelt of thtl gear.y a frirtion ring over-lap ping` tl spreuken bolts passing through the itin-fogli the friction ring and springs between the friction ring and heads of the bolts for pressing the friction ring with force against the sprocket so as to bind the sprocket to the device on the power shaft for all ordinary purposes of communicating power and rotation.

4.-. In a metal sawing machine, the combination with a power shaft d, screw feed shaft 2, a Shaft c and driving connections between the shaft i2 and shaft 71:, of a gear f1.5 loosely mounted on the shaft la and having a sleeve ft, gearing connecting the shaft d and gear 71.5, a disk c" pinned to the outer end of the shaft 7c, a tianged disk c2 surrounding the sleeve of the gear h5 and a friction disk between the disks c and 02 and means for applying pressure against the gear h5 and the disk c2 so as to create sufficient friction to cause the rotation of the gear h5 through the disk c1 to rotate the shaft 7c.

5. In a metal sawing machine, the combination with a power shaft d, screw feed shaft 2, a shaft la and driving connections between shaft 'if and shaft 7c, of a gear 7L loosely mounted on the shaft .7e and having a sleeve la. gearing connecting the shaft d and gear h5, a disk c1 pinned to the outer end of the shaft k, a flanged disk u2 surrounding the sleeve of the ear h5 and a friction disk between the disks cl and c2, a collar surrounding the shaft la, ball bearings intervening between said collar and thc gear It and adjustable spring actuated manually controlled devices` liearing upon the eoliar and exerting a force to more tht` collar, thc bearings` and the gear longitlulinally of the shaft to Create a friction be tween the disks r and c" to Cause the shaft la to rotate with the rotation of the gear h5.

G. ln a metal sawing urachine, a housing aa longitudinally movable screw feed sha ft i? ha vingr a bearing therein, a vertical shaft vn mounted in said housing.y a rocher coinv prising a tubular standard o, of arms` o and other armsl ffl a shaft' means c-ouucrtiug the shaft and the srrew feed `shaft i for the' rotation of the latter. (leviers muuu-vital lo the srrew feed xshaft aud adapted to beat' upon the free ends of the arms o1q doth-er1 rrlnlu'i'trd lo lln shaft .fr providing for ilurotation thereof and upon whirh the armsu fr' real'. uluirhy a longitudinal unirrnu-nl nl' lho screw fred shaft vill rausc the Vorher lo rele-aso the devices upon the shaft /tz 7. 1n a metal sawing machine` a housing' (r2 a huigitudiinilly movable sri-cw fwd sha ft i having a bearing therein` a vertical shaft t mounted in .said housing` a rocher vomA prising a tubular .standard o, of arms` ol. and other arms o`'7 a shaft la, means connect ing thc shaft /r and the screw feed shaft i for the rotation of the latter, devices connected to the screw fetatshaft and adapted to bear upon th:` free ends of the` arms Us,

devices connected to the shaft k providing for the rotation thereof and upon which the arms` o? rest. wherehi7 a longitudinal increment of the screw feed shaft will cause the rocker to release the devices upon the shaft and spring actuated manually eontrellcd devices causing the tree ends ot' the arlns o to hear with regulatable force upon the devicesy mounted upon the shaft r for transmitting the rotation and power thereto.

ln a metal sawing machine.y the colnhination with a longitudinally lnovahle screw feed shaft if, a power shaft a. a shaft Z1, means connecting the shaft. Il? with the shaft` 2 Jfor its rotation and means connecting the power shat't d with the shaft Il' for its rotaA tion including gearingr and friction devices on the shaft f. of a collar Q4 on the screw feed shaft and a .shoulder produced by the reductionof the diameter thereot, a collar 2G with trunnions 2T and an intervening thrust bearing 25, a collar Z1, a shaft` m in the housing` and a rocker device mounted thereon having two pairs ot arms extending in opposite directions, one pair adapted to hear upon the trunnions Q7 and the other pair adapted to hear upon the collar l* and manually controlled spring actuated devices providing a constant regulatable tension against the pair otA arms bearing upon the collar Z1 for producing a friction to drive the shat't I.: from the power :shaft` rl and which devices are released by the longitudinal movement ot' the screw feed shaft under stress exerting a pressure on the arms and hearing` upon the trunnions 27.

t). ln a metal sawing machine., the comhination with a longitudinally movable screw feed shaft 2, a power shaft d, a shaft means connecting the shaft Z: with the shaft for its rotation and means connecting the power shaft (Z with the, shaft` l'or its rotation including gearing and friction devices on the shaft 1, of a collar 24 ou the .screw t'eed shaft and a shoulder produced h v the reduction of the diameter thereof, a collar 2G with trunnions 2i' and an intervening thrust bearing 25, a collar Z1, a shaft 'in in the housing and a rocker device mounted thereon having two pairs of arins extending in opposite directions. one. pair adapted to hear upon the trunnions 27 and. the other pair adapted to bear upon the collar Z1, a shaft n also in trnnnions in the housing: :i manuallyT actuated lever connected thereto. a fixed device for holding said lever as set and regulatahle spring controlled devices cxtending between Said shaft and arms of .said rocker for applying a regulatahle pressure.

l0. ln a metal sawing machine. the cour hination with a housing a?, a shaft my therein, a longitudinally movable screw shaft 2, a shaft 7c and devices mounted therein tor communicating power and rotation. of a rocker comprising a tubular standard 0, a` pair of arms ol extending in one direction, a pair of arms o2 extending in the opposite direction, a` web 03 between the arms oB and having` a hole` therein, a shaft nfalso nu unted in the housing, a fixed toothed edge segment r, a lever .s upon the shaft n and a pawl spring actuated and carried by said lever and engaging the toothed edge of the segment, an arm upon the shafty fn, a screw rod carried hy said arin passing through the hole of the web 03, a helical spring around said red and a nut for applying pressure to said spring between the rod and said weh, substantially as .set forth.

Signed by me this 27th da)y oll J'ulv. 1910.

CHAS. A. JUENGST. lVitnesses Gmo. T. Prisonnier, BERTHA M. ALLEN. 

